Relay



July 14, 1925.

T. s. cAsNER" RELAY Filed March 24, 1921 amado: JJ @W fm@ Patented July 14, 1925.

UNITEDl STATES THADDEUS STEPHENS CASNER, OF PLAIN PATENT OFFICE.

FIELD, NEW JERSEY, ASSIGNOR, BY MESNE y ASSIGNMENTS, TO RADIO ELECTRIC CLOCK CORPORATION, OF NEW YORK; N. Y.,

CORPORATION 0F DELAWARE.

may. i

Application led March 24, 1921. Serial No. 455,261.

i o all whom t may concern:

Be it known that I, THAnnnUs STEPHENS CASNER, a citizen of the United States, and residing at Plainfield, Union County, State of New Jersey, have invented certain new and useful Improvements in Relays, ot which the following is a specification.

The present invention relates to electrical relays andl particularly to relays to be used in connection with Wireless telegraph receiving sets, to receive the electricalimpulses from the receivin apparatus, and to open and Close a loca? circuit. The electrical impulses received by the average wireless telegraph receiving apparatus are relatively weak and the electrical impulses sent to the receiver of the apparatus are also weak though greatly amplified, being only taintly audible. In certain types of mechanism it is highly desirable to have a relay by meansot which a local circuit can be opened and closed in accordance with the w/ireless signals sent from a distant transmitting station, forjnstance at Arlington, Va. In my copendin'g application Serial 455,262 dated March 2l. 1921, is disclosed a mechanism tor automatically setting the hands ot a clock in accordance with such wireless signals re ceived each day at noon. This involves an electro-mechanical mechanism for adjusting the clock hands. a wireless receiving set. and a relay operatively connecting the two of apparatus. The rela)7 herein disclosed is particularly1 applicable for use'in such combination but is not limited in this respect being of general application and capable of being used in all cases where it is desired to use a relay which becomes operative upon receipt ot a very faint current impulse.

One embodiment of the invention is illustrated in the accompanying drawings, in which,

Figure 1 is a side elevation of part ing broken away;

Figure 2 is a front view of the same;

Figures 3 and 4 are perspective views of the two lever arms respectively of the relay, and

Figure 5 is a schematic view of the relay and showing a local circuit.

A support or base of insulating Amaterial is :indicated at 10 .in the drawings and mounted on this base member is a bracket which carriesthe ear piece or receiver 11 the relay,

and the several parts of the relay mechanism. "This bracket has a vertical portion 12 which joins.7 at its upper end, a short horizontal portion 13 and to the outer end oi" this horizontal portion is joined a. second relatively short downwardly extendingV portion 14. The bracket is preferably of sheet metal bent into the shape illustrated. but it may be formed in various ways. The vertical portion 12 has its central portion cut away as at 15 and this slot is continued into the horizontal portion 13, as shown in Fig. 1. The base ot' the bracket has a short upwardly projecting flange 16 provided with a circular aperture into which is inserted an insulat.

ing bushing 17. A contact screw 18 has threaded engagement with a cylindrical aperture which extends through this bushing. The telephone. receiver 11 is of wellknown type. for instance of the type known as the Brandes receiver. The vibratory diaphragm 19 is provided with an integral projection or boss 2O which extends forwardly and has its outer end in :ontact with the lever 21 at the middle Apoint thereof, which lies parallel to the diaphragml). This lever is rotatably` mounted on knife edges 22 of plate 23 which is secured to the rim of the receiver. is an adjusting screw 24 having threaded engagement with a sleeve 25'to which is v Extendingr through this plate` rigidly7 secured the tlat spring 2G.l One end ot this spring bears 4against plate 2S and its other end bears against the lower end of lever 21 and normally tends A soft rubber sleeve or covering 27 is provided for the free-end ot lever 21 and resting against this rubber covering is one end of a screw 2S which has threaded engagement with a second lever 29 arranged parallel to the first lever and rotatably mounted at its upper end on knife edge 3f). A spring 31 normally tends to maintain the lower end of this lever pressed toward the receiver with the head of screw 28 engaging the rubber covering of the free end of lever 21. A screw 32 is provided for adjustingv the pressure of spring 31 against lever 29. Screw 28 is located at approximately onefourth ot the distance between knife edge 30 and the lower end of lever 29. Contact and if this magnet is cle-energized the spring' g j .I 1,545,547

in electrical circuit with the batterjY and an electro-magnet 34 which electro-magnet, being normallyxenergized, normally maintains an armature 35, in a second circuit, out

of contact With an adjustable Contact 36 so.

that'this secondlcircuitis normally open. spring 37 normally'tends to close the cir,- cuit against the .action of electro-magnet ill will immedately move the armature to the right (Fig. 5) and close `the' secondary circuit. j i

' Then impulses are received from 'a wireless receiving set by the receiver the ydiaphragm 19 vibrates very` rapidly,r and this rapid movement is traiisuiittedt'o lever -2l. which is spring pressed against the boss 20 projecting from the diaphragm.' Ad# justing screw 281m lever Z9 at all times tends to remain inconta'ct with .the rubber covering on the end ot' leverQl and is struck a great manjIY light blows tlrerebv,

as the diaphragm vibrates. "The diahragm, as it vibrates, also tends to move toward the left (Fig. l) and the lever i9 will vmove toward the left and open the circuit through electro-magnet l-l. 'The movement'of the lower end ot lever. 2W is of course eight times greater than the move nient' ot the boss 14 on the diaphragml bc-` cause ot the multiplying effect of the Vlevers Lever 29 is made longer and heavier than lever 2l and, due to the soft cushion 27.

and its own weight. it cannot respond to individual vibrations. but onlyv to a series of vibrations. Thus when the diaphragm 19 vibrates, the leve'r 2l vand cushionA 2T vibrate and lever 2li 'tends to folloiv the vibration of lever 2l ont cannot do so diie. to its Weigltand length. In vinrating'the diaphragmil) also shifts its center of vibration slightly toward the left (in tlie'lririindes receiver)A and'levers 2l and 29 'follow it, thus opening the local circuit at contact 18.

The 'rubber cushion a'ctsto prevent chatter-A inn ofthe relay levers and to prevent lever j .29 from bouncing away from lever 2l. It

gives a smooth action to the relay and insures the proper opening and closing ofthe local circuit,

The design and arrangement of the coinponent parts of the invention may be varied Without departing from the spirit and scope ot the invention.

What is claimed is:

l. In a. relay of the class described. in combination. a vibra-tory diaphragui, a lever parallel to said diaphragm said lever being p-ivoted at one end and operatively connected at its middle vpoint tothe center ot the diaphragm, a second lever parallel `to the first lever pivoted at one end and operatively connected at its quarter point to the free end of the second lever` spring means normally tending to move both of said levers.

toward the diaphragm, and an adjustable stop limiting the outward movement of the second lever, said stop constituting the` fixed contact ot a switch and said second lever constituting the movable contact. Q ln a relayof the class described,.in combination, a vibratory diaphragm,V a

same toward the diaphragm.

Illu a relay of the'class descidbedy in coinbination,y a vibratory member, andi Hmeans tor, inultip'lving the movements ot said member including a lever, inezmsnormallvpressing said lever into operative engageiiientwitli the vibi'atoi'y member. aI

second lever, means normallyv pressing said second lever into lengagement with tlie first lev rand a. cushion between said levers and holdingI them apart.

j ln' testimony yvhereof I .hereunto al-lis my signature. V V

THADDEUS STEPHENS CSNER. f 

